Jointing metal sash-bars.



F. CRITTALL.

JOINTING METAL SASH BARS.

APPLICATION FILED JUNE22, 1911.

1,016,916, Patented Feh'6, 1912.

our.

FRANCIS HENRY CRIT'TALL, or BRAINTREE, ENGLAND.

STATES PATEN J OINTING META-L SASH-BARS.

1 ,O16,916 Specification of Letters Patent. Patented F b 6 1912Application filed June 22, 1911. Serial No. 634,763.

To all whom it may concern. I the flange and the web of the other bar,the Be it known that I, FRANCIS HENRY Cnrrweb of each bar having arectangular slot TALL, a subject of the King of Great Britain, cut in itto receive the uncut portion of the residing at Manor Works, Braintree,in the web of the other bar, suchwebs being other- 55 county of Essex,England, have invented wise uncut and having their metal otherwise newand useful Improvements in Jointing undisturbed, substantially asdescribed. Metal Sash-Bars, of which the following is 2. The process ofpreparing a T section a specification. bar forjointing with a bar ofequal size con- This invention relates to jointing T secsisting in firstseparating the flange of the 60 tion metal sash bars and is particularlyapbar from the web by a slit then enlarging the plicable to jointingbars of equal size. slit by bending the flange away from the In a jointmade according to this invenweb thus stretching it, next further enlargtion the flange of one bar lies between the ing the width and length ofthe slit and flange and the web of the other bar while lastly cutting arectangular slot in the web 65 the web of each bar has a rectangularslot substantially as described.

cut in it to receive the uncut portion of the 3. A joint between twocrossed T-section web of the other bar as has before been prosash barsof equal cross-section in which the posed but the webs are not otherwiseslit or flange of one bar lies between the flange and deformed in anyother way. web of the other bar, the web of each bar 70 In the drawingsFigures 1, 2, 3, and 4. having a rectangular slot cut in it to receiveshow in elevation the steps in preparing one the uncut portion of theweb of the other of. the bars for the joint. Fig. 5 shows in bar, suchwebs being otherwise uncut and elevation the other bar for the joint.Fig. having their metal otherwise undisturbed. 6 is an elevation insection showing the 4.. The process of forming ajoint between 75v joint,and Fig. 7 is a plan view of the joint. two T-section sash bars of equalsize which The drawings show two T section bars A consists in firstseparating the flange of one and B of equal size. In making a joint thebar from its web by a slit, then enlarging the web a of the bar A isfirst separated from its slit by bending the flange away from the flangea by a slit a as shown at Fig. 1. web thus stretchingit, then furtherenlarg- 80 The slit (1 is then opened and the flange a ing the width andlength of the slit, then stretched by means of a wedge-shaped punchcutting a rectangular slot in the web, next as shown at Fig. 2. The slita is next furinserting another bar crosswise in the openther enlargedand lengthened as shown at ing made in the first mentioned bar and thenFig. 3. This can be done by pressing the closing the bent flange of thefirst mentioned 85 flange a downward which tears it away bar down uponthe flange of the second bar. from the web a. Lastly the web-a has arec- 5. The process of forming a joint between tangular slot a cut in itas shown at Fig.4. two T-section sash bars of equal size, which The barB has a rectangular slot 79 out in its consists in first separating theflange of one web I) as shown at Fig. 5. The bar B is then bar from itsweb by a slit, then enlarging the 90 threaded through the hole in thebar A, the slit by bending the flange away from the space between thetop of the slot a and the web to thus stretch the flange, then cutting atop of the bent flange a (Fig. 4:) being sufrectangular slot in the web,next inserting ficient to allow of this. The slots a and If anotherslotted bar crosswise in the opening are then caused to engage with eachother made in the first mentioned bar, and then 95 and the flange a ispressed back so as to closing the bent flange of the first mentioiiedclosely embrace the flange 7. o'f the bar B bar down upon the flange'ofthe second bar.

and to close up the ends of the slit a as 6. joint between two T sectionsash shown in section and plan at Figs. 6 and 7 bars in which the flangeof one bar is sepa- What I claim is zrated from its web by a spaceoccupied by 100 i. A joint between two section sash bars the ,flange ofthe other bar and at each side in which the flange of one bar liesbetween of this space the flange of the first bar being Webs beingotherwise uncut and undisturbed.

FRANCIS HENRY CRITTALL Witnesses:

J OHN H. WHITEHEAD, H. D. JAMESON.

separated from its Web by a narrow slit, the Web of each bar having arectangular slot cut in it to receive the uncut portion of the Web ofthe other bar, such Webs being otherwise uncut and undisturbed.

7. A joint between two T section sash bars of equalcross section inwhich the flange of one bar is separated from its Web by a spaceoccupied by a flange of the other bar and at each side of this space theflange Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

